Any of the series of fifteen elements of the periodic table from actinium (atomic number 89) to lawrencium (atomic number 103), inclusive. In…
| 单词 | θ68873 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > specific elements > actinium > [noun] > or higher atomic number (1) actinide1945 Any of the series of fifteen elements of the periodic table from actinium (atomic number 89) to lawrencium (atomic number 103), inclusive. In… |
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